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A300130
Number of Motzkin trees that are a "uniquely typable skeleton".
0
0, 1, 0, 0, 2, 0, 1, 7, 1, 13, 34, 20, 100, 226, 234, 853, 1877, 2650, 8128, 18116, 30483, 85713
OFFSET
0,5
COMMENTS
From the Bodini-Tarau paper: "A uniquely typable skeleton is one for which it exists exactly one simply-typed closed lambda term having it as a skeleton."
LINKS
Olivier Bodini, Paul Tarau, On Uniquely Closable and Uniquely Typable Skeletons of Lambda Terms, arXiv:1709.04302 [cs.PL], 2017.
CROSSREFS
KEYWORD
nonn,more
AUTHOR
Michael De Vlieger, Feb 25 2018
STATUS
approved